Calculate the mass (in g) of each sample. a. 5.94×10 20 SO 3 molecules b. 2.8×10 22 H 2 O molecules c. 1 glucose molecule (C 6 H 12 O 6 )

Hello everyone in this question we asked calculate the mass in kilograms Of 8.63 times 10 to the 26 molecules of carbon di sulfide. Given that the Mueller Masters 76.14 g per mole, They were given 8.63 I'm center molecules of carbon di sulfide. And we need to first convert to moles using avocados number, Which is 6.0-2 Times 10 to molecules of carbon di sulfide in one mole of carbon and sulfide. And now we can convert to grams using the molar mass oh and one more of carbon and sulfide Whatever, Mueller Mast which is 76.14 programs. And now we can convert from grams to kilograms. We have 1000 g in one kg And this will give us 109 0.1 telegrams, which is deep. Thanks for watching my video and I hope it was helpful.

Ch.3 - Molecules and Compounds

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Tro 6th Edition

Ch.3 - Molecules and Compounds

Problem 75a

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Chapter 3, Problem 75a

Calculate the mass (in g) of each sample. a. 5.94×10²⁰ SO₃ molecules b. 2.8×10²² H₂O molecules c. 1 glucose molecule (C₆H₁₂O₆)

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Identify the given quantity: 5.94 \times 10^{20} \text{ SO}_3 \text{ molecules}.

Use Avogadro's number to convert molecules to moles. Avogadro's number is 6.022 \times 10^{23} \text{ molecules/mol}.

Calculate the number of moles of \text{SO}_3 by dividing the number of molecules by Avogadro's number.

Determine the molar mass of \text{SO}_3. The molar mass is the sum of the atomic masses of sulfur (S) and oxygen (O) from the periodic table: \text{Molar mass of } \text{SO}_3 = \text{Molar mass of S} + 3 \times \text{Molar mass of O}.

Multiply the number of moles of \text{SO}_3 by its molar mass to find the mass in grams.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Molecular Mass

Molecular mass is the sum of the atomic masses of all atoms in a molecule, expressed in grams per mole (g/mol). For sulfur trioxide (SO3), the molecular mass can be calculated by adding the atomic mass of sulfur (approximately 32.07 g/mol) and three times the atomic mass of oxygen (approximately 16.00 g/mol), resulting in a total molecular mass of about 80.07 g/mol.

Avogadro's Number

Avogadro's number, approximately 6.022 x 10^23, is the number of particles (atoms, molecules, etc.) in one mole of a substance. This constant allows chemists to convert between the number of molecules and the amount of substance in moles, which is essential for calculating mass from a given number of molecules.

Mass Calculation from Molecules

To calculate the mass of a sample from a given number of molecules, first convert the number of molecules to moles using Avogadro's number. Then, multiply the number of moles by the molecular mass of the substance. This process provides the mass in grams, allowing for practical applications in chemistry.